doc/filter_design.txt: Fix duplicate words

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
FFmpeg · Aug 12, 2013 · e1c44be · e1c44be
1 parent 53f309c
commit e1c44be
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/doc/filter_design.txt b/doc/filter_design.txt
@@ -166,7 +166,7 @@ Buffer references ownership and permissions
       WRITE permission.
 
     * Filters that read their input to produce a new frame on output (like
-      scale) need the READ permission on input and and must request a buffer
+      scale) need the READ permission on input and must request a buffer
       with the WRITE permission.
 
     * Filters that intend to keep a reference after the filtering process